Reimu's Maternal Instinct Filled Yun-Life
Reimu is born from pair of wild yukkuri. Her father is a great hunter and her mother is good at singing. She had two active Marisa little sister and a Reimu youngest sister.
They live an easy life until one night, human forced them out.
Third daughter Marisa is grabbed by the human while father Marisa futilely tried body slamming on the human.
Despite Mother Reimu telling Marisa to close her eyes and mouth, Marisa's paste leaked out when the human tightened his grip. The paste rained on their hair and the eyes fall on Reimu and her mother.
While tending Father Marisa who got kicked to a tree and vomitted paste, the Youngest Reimu is grabbed and stabbed with a skewer. After that, the other Marisa who tried escaping is also stabbed. He carefully avoided their core so they don't die easily.
Marisa is forced to admit she's the weakest. For Marisa type who believed they're the strongest, this is the biggest insult in her life. Even so, after her braid got pulled off and the human threatened to take away her hat, Marisa admitted she's weak.
The human then took out a lighter and burned the youngest Reimu slowly. When Reimu struggled, the stick injured her paste core and turned her into an incomplete yukkuri.
As the human promised, he will free Marisa from this suffering, so unlike Reimu, he concentrated the flame and burn Marisa quickly.
To heal the dying Father Marisa, he put the two children into Marisa's mouth and forced her to eat them. Marisa ate them and got healed, frightening her family because she know those are her children.
But Marisa had another thought. Those two children can't be saved anymore, so she'd rather eat them to recover some strength to hold the human back.
Mother Reimu took Reimu into the nest hole to hide until the human go. Mother Reimu promised to protect Reimu no matter what. Luckily the hole is too deep, but that human's nail is already scratching on mother Reimu.
The next morning, Reimu alone is rescued by the clan. She's adopted by her relative, a Marisa (Father Marisa's younger sister) and Patchouli with their single daughter Marisa.
Marisa is very caring and protective of Reimu. She grows into the best hunter in the clan. Reimu is raised in love and became the most wanted girl in the clan.
Both married and have a happy and easy life. Marisa always hunt many food while Reimu stayed at home to do house chores and raise her children.
One night, a human pulled them out of their nest.
[Repeat above to every iota]
While protecting her last daughter from the reaching hand, Reimu remembered. This happened before, so she know what she must do, just like her mother.
Reimu turned into a steel sphere.
Astron is an ability of Reimu type, their ultimate defence. Reimu types can change their body into solid steel, about 30 kilogram each.
This ability is so rare so it's been considered an urban legend before. Yukkuri can also do this to protect others, so you can't expect this from those stray "mother".
The hole Reimu living in is not a hole at all. It's a box where Reimu has never even open her eyes.
Here, Reimu types are breeded at industrial scale. The stalk are cut off from their mother and feeded with mixture of nutrition and powerful sedative.
After they're born, the yukkuri are then feeded with nutrition, growth formula, sedative, and mixture of memory paste. Normally feeding memory paste will create chaos in their mind, but these yukkuri are cut off from their mother before they developed their own personality. They then grow up watching dream made with fake memories.
Factory has managed to make memory paste, including the content. Thanks to this, the pet division can mass produce nicehead yukkuri pet. Unfortunately, the percentage of pets turning into scum after being sold don't change much from before.
The scenario for an Astron-capable Reimu are as follow.
As a baby, born in a happy family that got destroyed by abyuser.
As a child, got adopted by relative and got really close to her caring cousin Marisa.
As an adult, marry Marisa she loved and have a happy family.
All this took 50 hours, which by then Reimu has already grow into a fat adult thanks to the growth formula.
When Reimu finally woke up, behind her is a baby yukkuri doll. Without realizing she's dreaming all these time, Reimu remembered what her mother did and protect the baby doll, doing Astron.
Thanks to this, Factory reaps great profit. The country also benefit from the cheap and huge quantity of steel. The excess product can even be exported.